System and method for tracking guiding lines by an autonomous vehicle

An autonomous transporting tool is adapted to travel along a guiding line. The tool comprises two transporting elements. Each of the transporting elements comprise autonomous propulsion means, a control system and an optical system. The optical system comprises two cameras and two lighting units. The system is adapted to identify the location of the image of a guiding line within a received image of the floor and to provide steering commands adapted to steer the transporting tool so that the image of the guiding line is located substantially in the center of the received image.